Stairway has 20 steps. Each step has a length of 22 cm and a height of 15 cm. Calculate the length of the handrail of staircases if on the top and bottom exceeds 10 cm.

Correct result:

x =  552.5411 cm


a=(20 22)2+(20 15)2=20 709 cm532.5411 cm x=2 10+a=2 10+532.5411=552.5411 cm

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